Pitman for mowing-machines



(NoModel.)

- 0. D. BROWN.

PTMAN FOR MOWING MACHINES. No. 362,058. Patented May 8, 1887.

UNITED STATES PATENT OFFICE.

OWEN DORSEY BROVN,

OF DAYTON, ASSIGNOR TO HOOVER 8v GAMBLE,

OF MIAMISBURG, OHIO.

SPECIFICATION forming part of Letters Patent No. 362,058, dated May 3, 1887.

Application filed February 15l 1887. Seria] No. 227,714. (No model.)

To all whom it may concern:

Be it known that I, OWEN DoRsEY BROWN, a citizen of the United States, residing at Dayton, in the county of Montgomery and State of Ohio, have invented certain new and useful Improvements in Pitnien for Mowing-Machines, of which the following is a full, clear, and exact description, reference being had to the accompanying drawings, forming part of this specification.

My invention has for its object an improvement in the construction of wrist and pitman connections for mowingmachines, whereby all the advantages of a ball-and-socket-joint connection are obtained without the annoyance arising from the constant watching and frequent oilingnecessary'in such construction.

rllhe novelty of my invention will be herein set forth, and specically pointed out inthe claims.

In the accompanying drawings, Figure l is a longitudinal central sectional View through the upper end of the pitman, its head, and the box. Fig. 2 is a plan view of the same. i

The same letters of reference are used to indicate identical parts in both figures.

A represents the box provided with perforated side lugs, a, a bore, b, to receive the wrist-pin upon the iiy-wheel, and with its side c next the pitman-head rounded or convex, to conform to the section of a sphere. The pitman-head B is an internally-threaded sleeve, provided at its end next the box with a concavo-convex dange, d, that tits upon the rounded side c of the box,and is held in place by a malleable clamp, C, having a concavoconvex central portion to tit over the flange d of the pitman-head and confine the same, but not so tightly as to prevent its free play within the limits ofthe aperture in the clamp through which the head passes. This apen ture e is elongated horizontally to permit a slight lateral play to the pitman, but no vertical play, while at the same time the pitmanhead is free to roll or turn with the different adjustments of the cutter-bar.

The clamp O is provided with perforated earsf, upon the under side of which are one or more spacing-lugs, g, which rest upon the ears c of the box. The parts are held together by bolts D, which are passed through the perforations in the ears a f. The threaded end of the pitman E is screwed into the head B, and is held from turning by a spring key or pin, F, inserted through elongated slots h and an aperture in the pitman.

It will be seen from this connection of the pitman with its head that it can be lengthcned or shortened at pleasure, and also that in oase of wear the lugs g can be filed off as much as necessary to bring the clamp C down closer to compensate for such wear.

While I have described the clamp C as having a concavo-convex central portion, it will he observed that the exterior shape of said clamp is immaterial, and that it is only necessary that its under surface should be concave. By this construction I have all the convenience afforded by a ball-and-socket connection, together with the strength and durability of a straight wrist.

Having thus fully described my invention, I claimw l. In a wrist-connection for the pitmau of a mowing-machine, the combination of a box, A, having` a convex bearing-surface next the pitman-head, the pitmanjhead having a concavo-couvex flange to iit uponthe convex portion of the box, and a clamp having a horizontally-elongated aperture for the passage of the pitman-head and a concavity to iit upon the flange of the same, the parts being united by bolts, substantially as and for the purpose specified.

2. In a wrist-connection for the pitman of a mowing-machine, the combination of a box, A, having a convex bearingsurface next the pitman-head, the pitman-head composed of an internally-threaded sleeve provided with slots h and having a concavoconvex flange to it upon the convex portion of the box, and a clamp having a horizontally-elongated aperture for thc passage of the pitmanhead and a concavity to fit upon the flange of the same, the parts being united by bolts, substantially as and for the purpose specified.

3. The combination and arrangement of the convex flange el, the bolts D, ptman E, and box A, having perforated side ears, a, and a spring-key F, substantially as and for the pureonvex bearngsurfaee, c, clamp C, having pose specified.

the perforated ears f, spacing-lugs g, elon- OWEN DORSEY BROWN. 5 gated aperture e and eoneave bearing on its "Witnesses:

inner side, the pitman-llead B, threaded'nter- LEVI VEISER,

nally, having elongated slots h and coneavo- AMOS K. CLAY. 

